new FMF power bomb pipe and more Jetting Q??

By Reis Racing, Posted May 11, 2011

after smashing my KX450 pipe i bought the FMF head pipe. The bike has a dead spot from idle. The bike ran great with the kx-f pipe after i drilled the main jet. But now it has a dead spot when i go to rev it from idle.

By DRZ400SK4, Posted May 11, 2011

I have an FMFPowerbomb header with an FMF Powercore can. I'm at sea level, with the airbox snorkle removed and the the AIS taken off the bike.

The JD jetting kit was the ticket to joy for me. I'm running the 170 main jet, and the red needle, with the clip in the middle position. The bike runs perfectly, with no dead spots, no bogging, no surging, warms up quickly, and runs much cooler than stock. Goes like stink, too. And I didn't even have to touch the fuel screw.

Some folks complain that the JD kits cost a little too much, but to me it was more than worth the ease of installation and desired results. Plug and play.

By Reis Racing, Posted May 11, 2011

Can the accelerrator pump be adjusted?

By DRZ400SK4, Posted May 11, 2011

Can the accelerrator pump be adjusted?

The JD jetting kit comes with two different tension o-rings to adjust the pump squirt.

By Reis Racing, Posted May 11, 2011

don't get how o-rings are use to adjust the pump

By DRZ400SK4, Posted May 11, 2011

They are basically used like glorified rubber bands, on the linkage...

There's more info on how to make other adjustments to the pump, here...